KTeV Kl3 radiative decays plots

"Measurements of the Branching Fraction and Decay Distributions
for KL-> pi+-mu-+nu gamma and
KL-> pi+-e-+nu gamma"

feyn_diag.eps,
feyn_diag.pdf
FIG. 1: Feynman diagrams for the first-order radiative corrections to the Kl3 decay mode. Diagrams (a)-(f) are the virtual corrections while diagrams (g)-(i) are the innerbremsstrahlung corrections. The open circles in diagram (b) and (c) denote the self-energy correction to the pion and lepton wavefunctions, respectively.
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detector_noreg.eps,
detector_noreg.pdf
FIG. 2: Plan view of the KTeV(E832) detector. The evacuated decay volume ends with a thin vacuum window at Z=159m. KL decays from the two neutral beams are the source of semileptonic decays.
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csilayout.eps,
csilayout.pdf
FIG. 3: Layout of CsI calorimeter. The small crystals (inner region have dimension 2.5 x 2.5 x 50 cm3. The two neutral beams go through the beam holes (into pagee) shown by the two inner squares. The fiducial cut, indicated by the dark lines, excludes radiated photons that hit a crystal near the beam holes or near the outer boundary.
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csiadc.eps,
csiadc.pdf
FIG. 5: For radiated photon cluster candidates in the Ke3gamma sample, (a) cluster energy deposit in RF bucket prior to event, and (b) cluster energy deposit in the first RF bucket. Energy is shown as ADC counts (1 ADC count i about 1 MeV). The arrow in each plot indicates the selected region.
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xbrem.eps,
xbrem.pdf
FIG. 6: (a) Top view of spectrometer (DC1-4) and CsI calorimeter, and overlay of Ke3gamma decay. Delta Rgamma-brem is the distance between the photon candidate at the CsI and the location of the electron track projected from upstream of the magnet (dotted line); the latter is where a photon from external bremsstrahlung woudl hit the CsI. (b) Delta Rgamma-brem distribution for data (dots), for MC with radiated photons (dashed histogram). Plots are shown after Ke3gamma requirements. The arrow indicates the analysis selection.
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brkm3rad_compare.eps,
brkm3rad_compare.pdf
FIG. 9: Comparisons of RKmu3gamma among experiment and theory for (a) E*gamma > 10 MeV, and (b) E*gamma > 30 MeV. The experimental results are from KTeV and NA48. The thoery predictions are from Andre and from Fearing, Fischbach, and Smith, FFS. The FFS prediction is determined by NA48, and is corrected by (1 + deltamuK)-1. The theory uncertainties are taken to be deltamuK = 0.019 times the prediction.
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brke3rad_compare.eps,
brke3rad_compare.pdf
FIG. 10: Comparison of RKe3gamma among experiment and theory for (a)E*gamma > 10 MeV, and (b) E*gamma > 30 MeV and theta*gamma e > 20o. The experimental results are from KTeV (this result and also KTeV 01), and NA31. The theory predictions are from Andre, Fearing, Fischbach, and Smith, FFS, Bijnens, and PHOTOTS. The FFS prediction is dtermined by Doncel and by KTeV, and each is corrected by (1 + deltaeK)-1. The theory uncertainties are taken to be deltaeK = 0.013 times the prediction. The PHOTOS predictions fro one and two radiative photosn are described in Sec. VI B.
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km3cm.eps,
km3cm.pdf
FIG. 11: Data-MC comparison of Kmu3gamma kinematics. For the two kaon energy solutions in the lab, (a) minimum radiated photon energy in kaon rest frame, and (b) maximum cosine of the photon-muon angle in kaon rest frame. Data are shown in dots; MC in histogram. The chi2/dof at the top of each plot refers to the data-MC comparison; data/MC ratios are shown in the lower plots. All Kmu3gamma selection requirements have been applied, and background is subtracted.
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ke3cm.eps,
ke3cm.pdf
FIG. 12: Data-MC comparison of Kmu3gamma kinematics. For the two kaon energy solutions in the lab, (a) minimum radiated photon energy in kaon rest frame, and (b) maximum cosine of the photon-muon angle in kaon rest frame. Data are shown in dots; MC in histogram. The chi2/dof at the top of each plot refers to the data-MC comparison; data/MC ratios are shown in the lower plots. All Ke3gamma selection requirements have been applied.
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kmu4.eps,
kmu4.pdf
FIG. 13: For the two kaon energy solutions, the invariant muon-neutrino mass closest to pion mass (m'mu nu) is shown in (a) for data (dots) and MC KL-> pi+pi-pi0 (histogram). (b) shows the m'mu nu distribution for MC KL->pi0pi+-mu-+nu. The vertical lines show the selection window for KL->pi0pi+-mu-+nu candidates. All KL->pi0pi+-mu-+nu selection requirements, except for m'mu nu, have been applied.
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